| 摘要 |
A porous structure comprising a ceramic material, mainly formed by or consisting of an oxide material comprising titanium, aluminum, zirconium and silicium satisfying the following composition, in wt % on the basis of the oxides: more than 15% but less than 55% Al2O3; more than 20% but less than 45% TiO2; more than 1% but less than 30% SiO2; more than 0.7% but less than 20%, in total, of at least one oxide chosen from ZrO2, Ce2O3 and HfO2; less than 1% MgO; said composition furthermore comprising other elements chosen, on the basis of oxides, from CaO, Na2O, K2O, SrO, B2O3 and BaO, the total summed amount of said oxides being less than 15% but greater than 1%; and said material being obtained by reactive sintering of said simple oxides or of one of their precursors, or by heat treatment of sintered particles, satisfying said composition.
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